Method: FSDB::Database#delete

Defined in:

lib/fsdb/database.rb

#delete(path, load = true) ⇒ Object

Delete the object from the db. If a block is given, yields the object (or nil if none) before deleting it from the db (but before releasing the lock on the path), and returns the value of the block. Otherwise, just returns the object (or nil, if none). Raises DirNotEmptyError if path refers to a non-empty dir. If the dir is empty, it is deleted, and the returned value is true. The block is not yielded to. If the load argument is false, delete the object from the db without loading it or yielding, returning true.

# File 'lib/fsdb/database.rb', line 670

def delete(path, load=true)                  # :yields: object
  abs_path = absolute(path)
  file_id = get_file_id(abs_path)
  delete_later = false
  object_exclusive file_id do |cache_entry|
    open_write_lock(path) do |f|
      if load
        object = cache_object(f, cache_entry)
        result = block_given? ? (yield object) : object
      else
        result = true
      end
      if File::CAN_DELETE_OPEN_FILE
        File.delete(abs_path)
      else
        delete_later = true
      end
      cache_entry.stale!
      del_version_of(f)
      result
    end
  end
rescue DirIsImmutableError
  begin
    Dir.delete(abs_path)
  rescue Errno::ENOENT
    # Someone else got it first.
  end
  true
rescue NotDirError
  raise NotDirError, "Not a directory - #{path} in #{inspect}"
rescue MissingFileError
  if File.symlink?(abs_path) # get_file_id fails if target deleted
    File.delete(abs_path) rescue nil
  end
  if PLATFORM_IS_WINDOWS_ME and File.directory?(abs_path)
    Dir.delete(abs_path)
  end
  nil
rescue Errno::ENOTEMPTY
  raise DirNotEmptyError, "Directory not empty - #{path} in #{inspect}"
rescue Errno::EACCES
  raise if File::CAN_OPEN_DIR
  raise unless File.directory?(abs_path)
  # on some platforms, opening a dir raises EACCESS
  Dir.delete(abs_path)
  true
rescue AbortedTransaction
ensure
  if delete_later
    begin
      File.delete(abs_path) rescue Dir.delete(abs_path)
    rescue Errno::ENOENT
    end
  end
  clear_entry(file_id)
end